I dmed a Dragon age table top camping for about a year and a half and I made a lot of stats for things the core books didn't cover so I've decided to post some of them here
Constitution 4 (Stamina)
Strength 3 (Arm Blade, might)
HP 15 Defense 12 Speed 4 Armor Rating 8
Arm blade +5 to attack roll damage: 2D6+3
Special Abilities and stunt bonuses
Centurions can preform pierce armor for 1 sp rather than the normal 2.
Magic Resistance: Only spells from the Primal School have any effect against a Centurion.
Powered By Blood Magic: A Centurion Mk.1 can only operate for six hours before having to be 'refueled' with blood magic energy. The Blood mage must make a Magic test using the Blood Magic focus and a TN of 15 then inflect 3D6 damage to the mage (or another living thing with blood). If passed the Centurion will have another six hours of power. Regardless of if you pass the check or not you still take 3D6 damage.
These were inspired by the Dwarven Automatons from The Elder Scrolls 5 Skyrim. The background I made for them in Dragon Age was that the dwarf who made Varric's crossbow Bianca had also secretly been working with some mages to try and make new golems. After years of experimenting the outcome was these 4 foot tall bronze robot like golems that were very weak if you could get past their armor and are powered by blood magic. A little over 30 Centurion Mk.1s were made before they were deemed unsuccessful and were sold on the black market. They were replaced by the Centurion Mk.2 (their stats will be posted sometime soon). Also the arm blade is just a long sword mounted to its arm.
Please tell me what you think and if you have any questions by all means ask! I'm not online on the weekends but I will try and answer as soon as possible.